How do you solve #cosx-sinxsin2x=0#?
1 Answer
Sep 13, 2016
Explanation:
Use trig identity:
sin 2x = 2sin x.cos x.
Substitute this value into the equation:
cos x - sin x (2sin x.cos x) = 0.
Put cos x into common factor:
Solve it by using trig table and unit circle:
a. cos x = 0 --> x = 0 and
b.
c.
d.
Arc
Arc
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